<template>
	<view>
		
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
				<block v-for="(item,i) in cateList" :key="i">
				<view :class="['left-scroll-view-item',i ===active ? 'active' : '']" @click="activeChanged(i)">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			
			<scroll-view scroll-y="true" :style="{height: wh + 'px'}" :scroll-top="scrollTop">
				
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<view class="cate-lv2-title">/ {{item2.cat_name}}
					</view>
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
						<image :src="item3.cat_icon" mode=""></image>
						<text>{{item3.cat_name}}</text>
					</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				wh:0,
				cateList:[],
				active:0,
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad(){
			const sysInfo=uni.getSystemInfoSync()
			this.wh =sysInfo.windowHeight -50
			
			this.getCateList()
		},
		methods:{
		 async getCateList() {
		        const { data: res } = await uni.$http.get('/api/public/v1/categories')
		        if (res.meta.status !== 200) return uni.$showMsg()
		        this.cateList = res.message
	
	
	               this.cateLevel2 =res.message[0].children
		      },

			activeChanged(i){
				this.active= i
				this.cateLevel2 =this.cateList[i].children
				
				
				this.scrollTop=this.scrollTop ===0 ?  1:0
			},
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container{
	display: flex;
	.left-scroll-view{
		width: 120px;
		
		.left-scroll-view-item{
			background-color: #F7F7F7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			
			&.active{
				background-color: #FFFFFF;
				position: relative;
				&::before{
					content: '';
					display: block;
					width: 3rpx;
					height: 30px;
					background-color: #C00000;
					position: absolute;
					top: 50%;
					left: 0;
					transform: translateY(-50%);
				}
			}
		}
	}
}

.cate-lv2-title{
	font-size: 12px;
	font-weight: bold;
    text-align: center;
	padding: 15px 0;
}
.cate-lv3-list{
	display: flex;
	  flex-wrap: wrap;
	.cate-lv3-item{
		
		width: 33.33%;
		display: flex;
		flex-direction: column;
		justify-content: center;
		 align-items: center;
		margin-bottom: 10px;
		image{
			width: 60px;
			height: 60px;
		}
		text{
			font-size: 12px;
		}
	}
}
</style>
